Looking for an answer to the problem I have when adding a photo file (jpg) to a topic. I have tried a variety of files, but when I preview, I always get an "Invalid Attachment" message for each file.
I have searched the forum for "Invalid Attachment" which returned two posts with a reported similar problem, but I have not found a posted solution.
Other things I have tried: filled any spaces in the file name with an underscore character. All the files I have tried are less than 100k. All are jpg files with the .jpg extension.